Screwdriver - TOOGOO(R) Plastic Handle T20 Security Torx Screwdriver Hand Tools Features 4mm torx diameter and a 2mm security hole. With a little magnetism design, it is more convenient and practical for use. Plastic handle in ergonomical shape provide great comfortable grip, precise tip ensure more secure fit. It is useful to open up electronic device, perferred for electrician, mechanic and repair shop for its versatile.